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Finding the Fourth Proportional to 684,190.74, 944,142.48 and 378,248.79

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Solution

The fourth proportional to 684,190.74, 944,142.48 and 378,248.79 is: 521,960.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    684,190.74 : 944,142.48 = 378,248.79 : x
  2. Step 2: Convert to fraction form
    684,190.74/944,142.48 = 378,248.79/x
  3. Step 3: Cross multiply
    684,190.74x = 944,142.48 × 378,248.79
  4. Step 4: Simplify right side
    684,190.74x = 357,120,750,647.60
  5. Step 5: Solve for x
    x = 357,120,750,647.60/684,190.74
  6. Step 6: Final answer
    x = 521,960.81

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.